Cheapest return flights from Ontario to Sao Paulo in September from $979

AirHint found the following cheapest return flights from Ontario (ONT) to Sao Paulo (GRU) in September 2025 (see full year).

Return flights

04 Sep - 09 Sep Avianca
06 Sep - 11 Sep Avianca
09 Sep - 16 Sep Avianca
05 Sep - 19 Sep United
09 Sep - 23 Sep United
10 Sep - 24 Sep United
12 Sep - 26 Sep United
17 Sep - 01 Oct United
19 Sep - 03 Oct United
20 Sep - 04 Oct United
06 Sep - 20 Sep United
08 Sep - 22 Sep United
11 Sep - 25 Sep United
29 Sep - 13 Oct United
30 Sep - 14 Oct United
18 Sep - 02 Oct United
22 Sep - 06 Oct United
24 Sep - 08 Oct United
21 Sep - 05 Oct United
26 Sep - 10 Oct United

Also check the deals for one-way flights from Ontario to Sao Paulo in September.

Skyscanner

The deals are updated regularly. The prices may go up as tickets are purchased by other travellers. Only the cheapest flights are offered. Select a price to book and secure these cheap prices.

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